SH-AWD Control Unit Inputs and Outputs

The SH-AWD control unit terminal voltages and the measuring conditions for the SH-AWD inputs and outputs test are done with the SH-AWD connectors connected.

Fig 1: Identifying SH-AWD Control Unit 20P Connector End View

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Terminal number	Wire color	Signal	Description	Measuring Conditions/Terminal Voltage
A1	BLK	LFH	Detects left search coil signal (positive)	With ignition switch ON (II), or vehicle in ON mode: about 2.5 V
A3	BLU	RFH	Detects right search coil signal (positive)	With ignition switch ON (II), or vehicle in ON mode: about 2.5 V
A5	LT BLU	K-LINE	Communication line SH-AWD control unit-to-DLC	With ignition switch ON (II), or vehicle in ON mode: about 0 V or battery voltage
A7	GRY	IG1	Power supply for SH-AWD control unit	With ignition switch ON (II), or vehicle in ON mode: battery voltage
A8	GRN	TOL	Detects differential fluid temperature sensor (negative)	With ignition switch ON (II), or vehicle in ON mode: about 0.2 V to 4.7 V (Depending on rear differential fluid temperature)
A9	BLK	LG1	Unit ground	With ignition switch ON (II), or vehicle in ON mode: about 0 V
A10	WHT	CANH	F-CAN communication signal	With ignition switch ON (II), or vehicle in ON mode: about 2.5 V to 4.0 V
A11	RED	LFL	Detects left search coil signal (negative)	With ignition switch ON (II), or vehicle in ON mode: about 2.5 V
A12	RED	RFL	Detects right search coil signal (negative)	With ignition switch ON (II), or vehicle in ON mode: about 2.5 V
A17	ORN	FSR	Drives SH-AWD relay	With ignition switch ON (II), or vehicle in ON mode: about 0 V to battery voltage
A18	WHT	TOH	Power supply for differential fluid temperature sensor	With ignition switch ON (II), or vehicle in ON mode: about 4.7 V to 5.0 V
A19	RED	WEN	Detects write enable signal	With ignition switch ON (II), or vehicle in ON mode: about 0 V
A20	BLK	CANL	F-CAN communication signal	With ignition switch ON (II), or vehicle in ON mode: about 2.5 V to 1.0 V